A gamma-ray burst at a redshift of approximately equal to 8.2

Nial R Tanvir, Derek Brindley Fox, Andrew J Levan, Edo Berger, Klass Wiersema, Johan Peter Uldall Fynbo, Antonino Cucchiara, Thomas Kruhler, Neil Gehrels, Joshua S Bloom, Jochen Greiner, Philip Andrew Evans, Evert Rol, Felipe Estay Olivares, Jens Hjorth, Pall Jakobsson, Jay Farihi, Richard Willingale, Rhaana L C Starling, Stephen Bradley CenkoDaniel A Perley, Justyn R Maund, James Duke, Ralph A M J Wijers, Andy J Adamson, Alasdair Allan, Malcolm N Bremer, David N Burrows, Alberto Javier Castro-Tirado, Brad Cavanagh, Antonio de Ugarte Postigo, Michael Andrew Dopita, Timur A Fatkhullin, Andrew S Fruchter, Ryan Joseph Foley, Javier Gorosabel, Jamie A Kennea, Thomas Kerr, Sylvio Klose, Hans A Krimm, V N Komarova, Shrinivas R Kulkarni, Alexander Sergeevich Moskvitin, Carole G Mundell, Tim T Naylor, Kim L Page, Bryan E Penprase, Matteo Perri, Philipp Podsiadlowski, Katherine C Roth, Robert E Rutledge, Takanori Sakamoto, Patricia Schady, Brian Paul Schmidt, Alicia Margarita Soderberg, Jesper Sollerman, Andrew W Stephens, Giulia Stratta, Tilan Niranjan Ukwatta, Darrach J Watson, Eduard Westra, T Wold, Christian Wolf

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517 Citations (Scopus)


Long-duration gamma-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z 20 using current technology. Hitherto, the highest redshift measured for any object was z = 6.96, for a Lyman-a emitting galaxy. Here we report that GRB 090423 lies at a redshift of z 8.2, implying that massive stars were being produced and dying as GRBs 630 Myr after the Big Bang. The burst also pinpoints the location of its host galaxy.
Original languageEnglish
Pages (from-to)1254 - 1257
Number of pages4
Issue number7268
Publication statusPublished - 2009
Externally publishedYes

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